How many students surveyed don't own a dog?

At Chaparral High School 150 students were randomly selected to take part in a survey about what kind of pets they had at home. Some of the results of the survey were then placed in the diagram below. For probability questions, you can assume that the results from the sample taken is a good representation of the student population at Chaparral High School. Pet Ownership Venn Diagram 56 Students Who Own at Least 37 One Dog 11 2 Students Who 41 Students Who Own at Least Own at Least One Cat One Horse